build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
apply from: "config.gradle"
buildscript {

    repositories {
        maven{url 'http://maven.aliyun.com/nexus/content/groups/public/'}
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.3'
        classpath 'com.novoda:bintray-release:0.8.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}
allprojects {
    repositories {
        google()
        maven{url 'http://maven.aliyun.com/nexus/content/groups/public/'}
    }
    tasks.withType(Javadoc) {
        options {
            encoding "UTF-8"
            charSet 'UTF-8'
            links "http://docs.oracle.com/javase/7/docs/api"
        }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}